Challenges in the Search for Perchlorate and Other Hydrated Minerals with 2.1-μm Absorptions on Mars

Leask, E. K.
Ehlmann, B. L.
Dundar, M. M.
Murchie, S. L.
Seelos, F. P.

Publication date

November 2018

Publisher

American Geophysical Union (AGU)

Abstract

A previously unidentified artifact has been found in Compact Reconnaissance Imaging Spectrometer for Mars targeted I/F data. It exists in a small fraction (<0.05%) of pixels within 90% of images investigated and occurs in regions of high spectral/spatial variance. This artifact mimics real mineral absorptions in width and depth and occurs most often at 1.9 and 2.1 μm, thus interfering in the search for some mineral phases, including alunite, kieserite, serpentine, and perchlorate. A filtering step in the data processing pipeline, between radiance and I/F versions of the data, convolves narrow artifacts (“spikes”) with real atmospheric absorptions in these wavelength regions to create spurious absorption‐like features. The majority of previo...

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Challenges in the Search for Perchlorate and Other Hydrated Minerals with 2.1-μm Absorptions on Mars

Abstract

Extracted data

Challenges in the Search for Perchlorate and Other Hydrated Minerals with 2.1-μm Absorptions on Mars

Abstract

Extracted data

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